Wrist-plate lock.



PATENTED'PEB. 10,1903'.

H. WEBER. WRIST PLATE LUCK. APPLICATION FILED SEPT. 25, 1902.

/NVENTOR WJTNESSES l NO'MODEL.

UNITED STATES PATENT OFFICE.

HENRY WEBER, OF MOUNT VERNON, OHIO, ASSIGNOR OF ONE-HALF TO EDWARD T.BERRY,-OF MOUNT VERNON, OHIO.

WRIST-'PLATE LOCK.

SPECIFICATION'forming part of Letters Patent No. 720,540, dated.February 10, 1903. Applicatiolrfiled Septemher 23, 1902. Serialvlo.124,525. (No model.)V

T a/ZZ whom t may concern:

Be it known that I, HENRY WEBER, a citizen of the United States,residing at Mount Vernon, in the county of Knox and Statefof Ohio, haveinvented a new and useful Wrist- Plate Lock; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the 4art to which it appertains tomake and use thesame.

The invention relates to steamengines, more particularly to the Corlisstype; and it has for its object to improve the construction for lockingthe wrist-plate to the eccentric-rod and to enable-the wrist-plate to bereadily connected with and disconnected from the same and to increasethe holding power of such devices.

The invention consists in the Vnovel con-i struction and arrangement-,ofparts hereinafter described and shown, and particularly pointed out inthe claims hereto appended.

In the drawings formingfpart of this'speciication, and in which likenumerals of reference designate corresponding parts, Figure l is a sideelevation of a wrist-plate lock constructed in accordance with thisinvention. Fig. 2 is a longitudinal sectional view of the same. Fig. 3is a similar view taken at right.

angles to Fig. 2. Fig. 4 is a transverse sectional view.

Referring to the drawings, 1 designates a bearing having a socket 2 andprovided withV an integral threaded shank 3, which is se# cured by a nut4 to a wrist-plate, and the said bearing is provided with opposite slots6 for the reception of an eccentric-rod 7 and to permit the necessaryoscillatory movement of the same. These slots 6 are covered by a band 8,which is adapted to oscillate on the bearing 1 and which is providedwith oppositely-disposed circular openings 9, through which passes theeccentric-rod, and the said band is thereby rigidly connected with theeccentric-rod and is adapted to move With the same. Within the socket ofthe bearing is l arranged a sleeve or cup 10, having a solid closedinner end 11 and provided with a transverse opening 12, whichcommunicates with the bore or interior of the cup and which re- .ceivesthe eccentric-rod and conforms to the configuration of the same. Theopening l2 is round or cylindrical, and at one end of the same isarranged an interior spline or projection 13, which fits in alongitudinal groove 14 of the eccentric-rod. The interior or socket ofthe cup is threaded at 15 to receive a hollow clamping-screw 16, havinga threaded inner portion 17 and provided with a beveled inner end toengage oppositely-disposed curved grooves 19 of the eccentric-rod, whichis also provided with adepression or cavity 20,-arranged concentricwiththe grooves 19 and adapted to be engaged by a spring-actuated stem 2l.vThe spring-.actuated stem, which has al reduced inner endor-stud 22 forengaging Vthe depression or cavity 2O of the eccentric-rod,is providedwith a reduced outer portion 23, forming a shoulder 24 and receiving acoiled spring 25, interposed between the shoulder "24: anda shoulder 26,formed by a reduction of the bore V27 of the hollow clamping-screw. Y Y-lThe hollow clamping-screw is provided in its outer portion with agroove for the reception of a lug 29 of the reduced outer portion of thestem 21, which is provided at its' outer end with a handle 30,consisting of a rod or pin arranged in a transverse perforation of thesaid stem 21. The hollow screw is also provided with a handle 32,arranged parallel with the eccentric-rod when the hollow screw -isVscrewed home. When it is desired to free the wrist-plate, thespring-actuated stem is drawn outward to carry the lug beyond theclamping-screw, and it is partially rotated to carry the lug away fromthe groove 28 and to engage. it with the outer end of the screw. Thescrew is then rotated to disengage its Vbeveled end from the groove ofthe eccentricrod. This releasesthe,wrist-plate, and when vit is desiredto lock the same the spring-actuated stem is rotated to return the lugthereof to the groove 28, and the parts are then adjusted until the studat the inner end of the spring-actuated stern snaps into the depressionor cavity of the eccentric rod. The clamping-screw is then screwed home,thereby firmly locking the wrist-plate to the eccen- ICO It will be seenthat the Wrist-plate lock is exceedingly simple and inexpensive inconstruction, that it possesses great strength and durability, and thatthe holding power of the device is greatly increased by engaging boththe screw and the spring-actuated stem with the eccentric-rod, therebyirmly locking the latter and the Wrist-plate together.

What I claim is- 1. In a device of the class described, the combinationof a bearing designed to be secured to a wrist-plate and provided with asocket, a cup arranged Within the socket of the bearing and providedwith interior screwthreads, an eccentric-rod extending through the cupaud the bearing, a clamping-screw fitting the threaded cup andinterlocked With the eccentric-rod, anda spring-actuated stemv mountedin the clamping-screw and also engaging the eccentric-rod, substantiallyas described.

2. In a device of the class described, the combination of a bearingdesigned to be secured to a Wrist-plate and provided with a socket, acup arranged Within the socket and having interior screw-threads, aneccentricrod passing through the bearing and the cup and provided with acavity and having coucentric grooves, a clamping-screw fitting in thecup and engaging thegrooves andaspringactuated stein mounted in theclamping-screw and engaging the'cavity of the eccentric-rod,substantially as described.

3. In a device of the class described, the combination of a bearingdesigned to be secured to a Wrist plate and an interiorlythreaded cupfitted Within the bearing and provided With an opening and having aprojection therein, an eccentric rod passing through the cup and thebearing and provided with a groove receiving the projection, and aclamping-screw fitting within the cup, and provided with aspring-actuated stem, substantially as described.

4.. In a device of the class described, the combination of a bearingdesigned to be secured to a Wrist-plate a nd' having a socket andprovided with opposite slots, a cup fitted Within the socket,aneccentric-rod passing through the cup and the bearing, a band arrangedon the bearing and covering the slots and connected with theeccentric-rod, and a camping-screw mounted in the cup and provided Witha spring-actuated stem, substantially as described.

In testimony whereof I have hereto ai'lixed my signature in the presenceof two Witnesses.

S. R. GoTsHALL, JAMES L. LEONARD.

